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[4.19,009/321] clk: samsung: exynos5420: Preserve PLL configuration during suspend/resume

Message ID 20191203223427.605281159@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Dec. 3, 2019, 10:31 p.m. UTC 
From: Marek Szyprowski <m.szyprowski@samsung.com>


[ Upstream commit e9323b664ce29547d996195e8a6129a351c39108 ]

Properly save and restore all top PLL related configuration registers
during suspend/resume cycle. So far driver only handled EPLL and RPLL
clocks, all other were reset to default values after suspend/resume cycle.
This caused for example lower G3D (MALI Panfrost) performance after system
resume, even if performance governor has been selected.

Reported-by: Reported-by: Marian Mihailescu <mihailescu2m@gmail.com>
Fixes: 773424326b51 ("clk: samsung: exynos5420: add more registers to restore list")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 drivers/clk/samsung/clk-exynos5420.c | 6 ++++++
 1 file changed, 6 insertions(+)

-- 
2.20.1
diff mbox series

Patch

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index ce30862617a6e..d5af937212992 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -171,12 +171,18 @@  static const unsigned long exynos5x_clk_regs[] __initconst = {
 	GATE_BUS_CPU,
 	GATE_SCLK_CPU,
 	CLKOUT_CMU_CPU,
+	CPLL_CON0,
+	DPLL_CON0,
 	EPLL_CON0,
 	EPLL_CON1,
 	EPLL_CON2,
 	RPLL_CON0,
 	RPLL_CON1,
 	RPLL_CON2,
+	IPLL_CON0,
+	SPLL_CON0,
+	VPLL_CON0,
+	MPLL_CON0,
 	SRC_TOP0,
 	SRC_TOP1,
 	SRC_TOP2,